Question 22

If the diameter of a circle is 7 cm, then what will be its circumference (in cm)?

Solution

Radius of circle = $$r=\frac{7}{2}=3.5$$ cm

=> Circumference = $$2\pi r$$

= $$2\times\frac{22}{7}\times3.5$$

= $$44\times0.5=22$$ cm

=> Ans - (B)

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